diff --git a/cmd/replay/src/main.rs b/cmd/replay/src/main.rs
index 896d0c2f98..c0c6a9ba80 100644
--- a/cmd/replay/src/main.rs
+++ b/cmd/replay/src/main.rs
@@ -49,10 +49,7 @@ fn main() -> anyhow::Result<()> {
     let _logger = starcoin_logger::init();
     let opts: ReplayOpt = ReplayOpt::parse();
 
-    let network = match opts.net {
-        Some(network) => network,
-        None => BuiltinNetworkID::Proxima,
-    };
+    let network = opts.net.unwrap_or(BuiltinNetworkID::Proxima);
     let net = ChainNetwork::new_builtin(network);
 
     let from_dir = opts.from;
diff --git a/config/src/lib.rs b/config/src/lib.rs
index 87320ca097..868f8b6dd2 100644
--- a/config/src/lib.rs
+++ b/config/src/lib.rs
@@ -484,15 +484,6 @@ impl NodeConfig {
         Self::load_with_opt(&opt).expect("Auto generate test config should success.")
     }
 
-    pub fn proxima_for_test(dir: PathBuf) -> Self {
-        let opt = StarcoinOpt {
-            net: Some(BuiltinNetworkID::Proxima.into()),
-            base_data_dir: Some(dir),
-            ..StarcoinOpt::default()
-        };
-        Self::load_with_opt(&opt).expect("Auto generate proxima config should success.")
-    }
-
     pub fn customize_for_test() -> Self {
         let opt = StarcoinOpt {
             net: Some(BuiltinNetworkID::Test.into()),
diff --git a/sync/src/tasks/tests.rs b/sync/src/tasks/tests.rs
index d6a24ed9cc..f023da088e 100644
--- a/sync/src/tasks/tests.rs
+++ b/sync/src/tasks/tests.rs
@@ -107,7 +107,8 @@ pub async fn test_sync_invalid_target() -> Result<()> {
 
 #[stest::test]
 pub async fn test_failed_block() -> Result<()> {
-    let net = ChainNetwork::new_builtin(BuiltinNetworkID::Halley);
+    // todo: fix this test for dag chain (dag effective height is ZERO)
+    let net = ChainNetwork::new_builtin(BuiltinNetworkID::Test);
     let (storage, chain_info, _, dag) = Genesis::init_storage_for_test(&net)?;
 
     let chain = BlockChain::new(